Wikipedia is listing a 37th direct-to-video movie titled "Trick or Trick Scooby Doo!". It also lists Scoob: Holiday Haunt separately so I wondered if anyone had more info on this : r/Scoobydoo
Scooby-Doo Holiday Collection (DVD) : Various, Various: Movies & TV - Amazon.com
Scooby-Doo and the Music of the Vampire (Movie) - Comic Vine - User Reviews
Scooby-Doo! Curse of the Lake Monster - Wikipedia
Scooby-Doo (S&SDGAC & Be Cool, Scooby-Doo!) - Loathsome Characters Wiki